212001020122 has 4 divisors (see below), whose sum is σ = 318001530186. Its totient is φ = 106000510060.

The previous prime is 212001020107. The next prime is 212001020129. The reversal of 212001020122 is 221020100212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 159760889401 + 52240130721 = 399701^2 + 228561^2 .

It is not an unprimeable number, because it can be changed into a prime (212001020129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53000255029 + ... + 53000255032.

Almost surely, 2^212001020122 is an apocalyptic number.

212001020122 is a deficient number, since it is larger than the sum of its proper divisors (106000510064).

212001020122 is a wasteful number, since it uses less digits than its factorization.

212001020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106000510063.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 212001020122 its reverse (221020100212), we get a palindrome (433021120334).

The spelling of 212001020122 in words is "two hundred twelve billion, one million, twenty thousand, one hundred twenty-two".